An item with internal machine threads designed to fit the external machine threads of a tube fitting. It has flat faces, one of which has a counterbored recess to accommodate packing, packing or sealing ring(s), gasket(s), and the like. The item, when installed, provides a method of locking and sealing the connection. See also locknut, pipe; nut (1), tube coupling and nut (1), plain, hexagon.
NSN 5950-01-477-5075
NSN 5975-00-439-2052
NSN 6130-01-584-9436
NSN 5998-00-961-0773
NSN 5910-00-813-7257
NSN 6130-01-063-5787
NSN 5985-00-004-6285
NSN 5930-01-449-1349
NSN 4140-01-474-5701
NSN 6110-00-068-6889
NSN 6645-01-611-5068
NSN 5930-01-125-7319